Sheet guard for platen presses



Patented rpr., 24, i923,

unirse stares ABRAHAM DANZGER, 0F NEW YORK, N. Y.

SHEET GUARD FOR PLATEN PRESSES.

Application filed November 19, 1921.

To all whom t may concern:

Be it known that l, ABRAHAM DANZIGER, a citizen of the United States ofAmerica, residing at the city of New York, in the State of New York,have invented certain new and useful Improvements in Sheet Guards forPlaten Presses, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawing, formingpart of this specication.

My present invention relates to improvements in platen presses and moreparticularly to the class having automatic sheet feeding and deliveringattachments, it is obvious though that my invention is applicable toother form of presses than those above mentioned.

One object of the invention is to provide f a suitable sheet guardhaving novel and improved features and of such construction as tointerrupt and deflect any air currents that may be generated by themotion of the various parts of the press or adjacent machinery whichwould tend to disturb t-he sheets upon the receiving platform.

Another object of the invention is to provide a. sheet guard havingnovel and improved construction and of such form as to cause the sheetsafter being delivered from the press upon the platform, to lie in amanner so as to prevent circulating air currents from having accessunder the edges of the sheets and thereby disturbing them. This will bemore fully described hereinafter.

It will be understood by those skilled in the art that after the sheetshave passed through the press and received the impression of the type,they are deposited upon ay platform by the delivery sticks, it is alsowell known that these superposed sheets are easily disturbed,particularly when of light gauge, by air currents generated by variouscauses, such as the revolving fly wheels; the passing by of an operator,or from the air under pressure used in connection with automatic feeddevices of this kind. The sheets thus disturbed finding their way intothe inking rollers, necessitating the stopping of the pressand thesubsequent loss of time of the operator in removing the same from therollers. It is further understood by those skilled in the art thatsheets having a series of rulings across them, tend to curl up at theedges parallel to said rulings, thus givingaccess to air currentsbetween the sheets,

Serial No. 516,429.

also that said curling prevents the sheets from properly abutting thestraighteningpins or sheet-joggers.

With the present improvements it is possible to double the speed of thepress without disturbing the sheets by the increased y from the back orplatenjside of the press, ofy

my improved sheet yguard mounted on the receiving platform.

Figure 2 is a longitudinal edge view of the sheet guard on a smallerscale than Figure 1.

Figure 3 is a transverse section of the sheet guard on a smaller scalethan Figure 1.

Figure 4 is a detailperspective view of the longitudinal rail or ribportion shown in Figure 3.

Figure 5 is a perspective View of a ruled sheet showing the curled edgesparallel with the rulings. f l

Figure 6 is an edge view of the guides illustrated in FigureV 1 showinghow the sheets may be manuallylifted with ease due to the guides spacingthem from the floor portion.

In the present instance 10 designates the platen press platform whichserves to receive the delivered sheets, 11 and 12 are thestraightening-pins or sheet-joggers which are adjustable along the slot13. The pin 12 oscillates as the sheets are delivered on the platformand moves them over against the pin 11. 14 designates an. aligning plateagainst which the sheets are straightened by gravity. The parts so fardescribed are standard structure.

On the platform 10 i secure in any suitable manner a guard 15, having anupwardly disposed longitudinal end wall 16, and side walls k17, 18disposed at right-angles to the wall 16, and a floor portion 19, theside walls 17, 18 are integral with the floor portion 19, the end wall16 is pivotal on the hinges 2() secured to the floor portion 19, to

permit of the same being lowered to the position shown in broken lines,thus giving access to the sheets deposited within said guard 15, thetortion springs 21 keep the wall 16 in its normally upright position,the walls 16, 17, 18 have transparent portions 22 fitted into suitableopenings in said walls, to permit the operator to view the interior froma nearby position, the side wall 17 has an offset portion 23 to permitthe pin 12 to oscillate when set at the end of the slot 13, the walls17, 18 are provided with cut out portions 24 to permit the offsetportions on the pins 11, 12 with their set screws 25 to be moved to theextreme ends of the slot 13.

To the floor portion 19 1 have secured in any suitable manner anddisposed transversely thereof, the guides 26 which are adapted tofrictionally engage and hold a rail or ribbed portion 27 g also securedto the Hoor portion 19 are upstanding offset portions 28 adapted toengage and hold a longitudinally disposed rail or ribbed por tion 29shown in Figures 8 and 1, having lugs 80 which when the rail 29 isplaced in the position shown in Figure 3, the lugs 30 Will abut theportions 28 to prevent the rail 29 passing` through them.

Perforations 31 may be made in the floor portion 19 to register with anyoil holes in the platform 10.

As shown in Figure 5, 32 designates a sheet, having ruled lines 83,which cause the edges 84 to curl upwardly due to the imprint of thelines on the paper as heretofore described. To obviate this objectionalfeature the rail 27 is placed in position under the guides 26 as shownin Figures 1 and 2, when the rulings extend transversely of the sheet,or the rail 29 in Figures 3 and 1i is placed in position under the parts28 when the rulings extend longitudinally of the sheet, this will causethe sheets 32 when deposited upon said rails 27 or 29 to bulge up at 35as shown in Figures 1, 2 and 3 and cause the edges 34 to lie flat.

In Figure 6 I have shown further utility of the rails 26 in which a packof sheets 32A, without rulings may be easily and quickly raised from thefloor portion 19 by inserting a. finger in the space 86, the rail 27 notbeing used in this case.

The above described sheet guard may be constructed of any suitablematerial and the walls 16, 17, 18 of such height as to interrupt anddeflect any air currents circulating about the platform 10 and the guard15.

Variations may be resorted to within the scope of the invention andportions of the improvements may be used without the others.

Having thus described my invention. 1 claim:

1. A guard ofthe character described and for the purpose specifiedadapted to rest upon the sheet receiving platform of a printing press soas to prevent air currents from dislodging the sheets therein containedand other means associated with said guard, and adapted to be disposedeither longitudinally or transversely thereof so as to prevent thesheets from curling at the edges.

2. 1n a printing press having a sheet receiving platform, thecombination of a guard upon said platform comprising means adapted toprevent air currents from displacing the sheets therein contained andother means associated with said guard and adapted to be disposed eitherlongitudinally or transversely thereof so as to underlie the sheets in amanner to prevent said sheets from curling at the edges.

8. In a printing press having a sheet receiving platform, thecombination of a guard upon said platform comprising upstanding walls,some of said walls being integral with a floor portion and adapted toreceive the sheets therein in a manner so as saitL guard will preventthe sheets from being disturbed by circulating air currents, and othermeans associated with said guard and adapted to be removably secured tosaid floor portion in a manner so as to underlie the sheets to preventsaid sheets from curling at the edges.

e. 1n a platen press having a sheet receiving platform, the combinationof a guard on said platform, said guard comprising a floor portion andupwardly extending walls having transparent portions therein, one ofsaid walls and adapted to be moved from a normally closed position to anopen position, means for retaining said wall in a closed position, allof said walls adapted to interrupt and deflect air currents, to preventsaid air currents from displacing the sheets contained within said guardon said platform and other means associated with said guard to causesheets deposited therein to assume a position so that the edges of saidsheets will remain in close contact.

3. 1n a platen press having a sheet receiving platform, the combinationof a guard on said platform, said guard comprising a floor portieri, aribbed portion disposed transversely thereof and adapted to underlie thesheets, means on said floor portion to engage said ribbed portion tohold the same in effective relation therewith and upwardly extendingwalls having transparent portions therein, one of said walls adapted tobe moved from a normally closed to open position, all of said wallsadapted to interrupt and deiiect air currents, to prevent said aircurrents from displacing the sheets contained within said guard.

G. in a platen press having a sheet receiving platform, the combinationof a guard on said platform, said guard comprising a floor portion, aribbed portion disposed longitudinally thereof and adapted to underliethe sheets, means on said floor portion to engage said ribbed portion tohold the same in effective relation therewith and upwardly extendingwalls having transparent portions, one of said walls having pivotalconnection with said floor portion, all of said walls adapted tointerrupt and deiect air currents to prevent said air currents fromdisplacing the sheets contained within said guard.

7. In a platen press, having a sheet receiving platform, the combinationof a guard on said platform, said guard comprising a floor portion,ribbed portions adapted to be disposed transversely or longitudinallythereof, said ribbed portions adapted to underlie the sheets, means forholding either one of said ribbed portions in effective relation withsaid floor portion, means on said floor portion to give access under thesheets to permit of manually removing said sheets from the guard,` andupwardly extending walls having transparent portions, one of said wallspivotally connected to said guard,

all of said walls adapted to interrupt and deiect air currents toprevent said air currents from displacing the sheets contained withinsaid guard.

8. In a platen press having a sheet receiving platform, the combinationof a guard on said. platform, said guard comprising a oor portion,detachable ribbed portions disposed transversely or longitudinallythereof, each of-said ribbed portions adapted to underlie the sheets,means for frictionally engaging said ribbed vportions to holdvthe samein effective relation with said guard, and a plurality of upwardlyextending walls connected to said Hoor portion and having transparentportions, one of said walls pivotally connected to said floor portion,all of said walls adapted to interrupt and deflect air currents toprevent said air currents from displacing the sheets contained withinsaid guard.

Signed at New York in the county of New York and State of New York this17th day of November A. D. 1921.

ABRAHAM DANZIGER.

